[DOCS-13740] Investigate changes in SERVER-48578: Skip fast count enforcement on the oplog when running validate with enforceFastCount=true Created: 30/Jun/20  Updated: 13/Nov/23  Resolved: 17/Aug/21

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: 4.7.0, Server_Docs_20231030, Server_Docs_20231106, Server_Docs_20231105, Server_Docs_20231113

Type: Task Priority: Major - P3
Reporter: Backlog - Core Eng Program Management Team Assignee: Unassigned
Resolution: Gone away Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Documented
documents SERVER-48578 Skip fast count enforcement on the op... Closed
Related
related to DOCS-13667 Investigate changes in SERVER-44650: ... Closed
Participants:
Days since reply: 2 years, 25 weeks, 1 day ago
Epic Link: DOCSP-15042

 Description   

Description

Downstream Change Summary

SERVER-44650 added the enforceFastCount mode to the validate command (documented by DOCS-13667). This ticket makes it so that the fast count will not be enforced when validate is run on the oplog collection, even if enforceFastCount is set to true (in other words, the enforceFastCount flag is ignored when validate is run on local.oplog.rs).

Description of Linked Ticket

Oplog writers only take a global IX lock, so the oplog can still be written to even during full validation despite its collection X lock. This can cause validate to incorrectly report an incorrect fast count on the oplog when run in enforceFastCount mode. Thus, even if enforceFastCount is specified, the fast count should not be enforced on the oplog.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)



 Comments   
Comment by Jeffrey Allen [ 17/Aug/21 ]

Given that we did not document the change for SERVER-44650, we will similarly not make any documentation updates for this ticket.

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